This document discusses dreams from both a scientific and religious perspective. Scientifically, it summarizes Evans' theory that dreams occur as the brain sorts and organizes information from the previous day during REM sleep. Religiously, it outlines three types of dreams in Islam - those from God, those from one's thoughts, and those from Satan. It notes that prophets' dreams are always true revelations, while ordinary people's dreams may be true if they are pious and speak honestly. The most truthful ordinary dreams occur just before dawn when God's mercy is closest.